IBM DS4500 manual Connecting two redundant storage expansion enclosure groups

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Leave the In port on the right ESM board on the first storage expansion enclosure in storage expansion enclosure group 2 and the Out (upper) port on drive mini hub 1 unoccupied.

Input Output Input Output

New DS4000 drive enclosure

Last DS4000 drive enclosure

Storage Expansion

Enclosures - Group 1

First DS4000 drive enclosure

Drive Loop A

Drive Loop B

DS4500 Storage

Subsystem

Drive Loop C

ESMs

Drive Loop D

First DS4000 drive enclosure

Storage Expansion

Enclosures - Group 2

Last DS4000 drive

enclosure	ds454min

Figure 16. Connecting two redundant storage expansion enclosure groups

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Contents Using IBM SFP modules and IBM fibre channel cables Removing an SFP module and fibre channel cable Installing an SFP module and fibre channel cableHost mini hubs Drive mini hubs Controller a Direct-attached host-side fibre channel cablingHost Host 2, Host Adapter 1 Host 3, Host Adapter 1 Drive-side fibre-channel cablingDrive mini-hub ports Drive interface portsOverview Cabling a DS4500 with four drive mini hubs Redundant drive loop cabling overview four mini hubs Overview Cabling a DS4500 with two drive mini hubs Cables Input Output Input Configuring the drive loops Storage expansion enclosure Out ESM board Loop B Fibre Channel cable Out ESM board Connecting a redundant drive loop to the DS4500 Connecting drive loop a to the DS4500 Storage Subsystem Connecting two redundant storage expansion enclosure groups Trademarks